diff options
author | Edward Welbourne <edward.welbourne@qt.io> | 2016-07-19 19:51:41 +0200 |
---|---|---|
committer | Edward Welbourne <edward.welbourne@qt.io> | 2016-07-19 20:14:40 +0200 |
commit | 782ebeada125e3d8a293c7806e34cc737c30ddda (patch) | |
tree | 5516ad24a7532d650289758abd5e92a35bc2240e /src/corelib/arch | |
parent | 091df96fb8da356dc9de81dc390f55e66d4d7c01 (diff) | |
parent | 62cbb434579a56871f0917bc306d592055381c00 (diff) |
Merge remote-tracking branch 'origin/5.7' into dev
Conflicts:
qmake/library/qmakebuiltins.cpp
qmake/library/qmakeevaluator.cpp
qmake/library/qmakeevaluator.h
qmake/project.h
QMakeEvaluator:
* evaluateConditional(): one side changed return type, the other
changed a parameter type.
* split_value_list(): one side changed a parameter adjacent to where ...
* expandVariableReferences(): ... the other killed one overload and
changed the survivor
src/corelib/io/qlockfile_unix.cpp
One side changed a #if condition, the other moved NETBSD's part of
what it controlled.
src/corelib/tools/qdatetime.cpp
One side fixed a reachable Q_UNREACHABLE in toMSecsSinceEpoch(), the
other moved it from the private class to the public one, in the midst
of the "short date-time" optimization, which confused diff entirely.
One side changed a QStringLiteral to QLatin1String, the other rewrote
adjoining code.
src/network/kernel/qauthenticator.cpp
Both rewrote a line, equivalently; kept the dev version.
src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
One side changed #if-ery that the other removed.
tools/configure/configureapp.cpp
One side added a check to -target parsing; the other killed -target.
tests/auto/testlib/selftests/expected_cmptest.lightxml
tests/auto/testlib/selftests/expected_cmptest.teamcity
tests/auto/testlib/selftests/expected_cmptest.txt
tests/auto/testlib/selftests/expected_cmptest.xml
tests/auto/testlib/selftests/expected_cmptest.xunitxml
Regenerated using generate_expected_output.py
I note that quite a few other expected_* come out changed, now.
There was no git-conflict in
src/widgets/kernel/qformlayout.cpp
but it didn't compile; one side removed some unused methods; the other
found uses for one of them. Put FixedColumnMatrix<>::removeRow(int)
back for its new user.
Change-Id: I8cc2a71add48c0a848e13cfc47b5a7754e8ca584
Diffstat (limited to 'src/corelib/arch')
-rw-r--r-- | src/corelib/arch/qatomic_cxx11.h | 187 |
1 files changed, 156 insertions, 31 deletions
diff --git a/src/corelib/arch/qatomic_cxx11.h b/src/corelib/arch/qatomic_cxx11.h index bb49aae4fb..9658aca37c 100644 --- a/src/corelib/arch/qatomic_cxx11.h +++ b/src/corelib/arch/qatomic_cxx11.h @@ -53,44 +53,168 @@ QT_END_NAMESPACE #pragma qt_sync_stop_processing #endif -#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT_TEST_AND_SET_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_SOMETIMES_NATIVE +/* Attempt to detect whether the atomic operations exist in hardware + * or whether they are emulated by way of a lock. + * + * C++11 29.4 [atomics.lockfree] p1 says + * + * The ATOMIC_..._LOCK_FREE macros indicate the lock-free property of the + * corresponding atomic types, with the signed and unsigned variants grouped + * together. The properties also apply to the corresponding (partial) + * specializations of the atomic template. A value of 0 indicates that the + * types are never lock-free. A value of 1 indicates that the types are + * sometimes lock-free. A value of 2 indicates that the types are always + * lock-free. + * + * We have a problem when the value is 1: we'd need to check at runtime, but + * QAtomicInteger requires a constexpr answer (defect introduced in Qt 5.0). So + * we'll err in the side of caution and say it isn't. + */ + +// ### Qt 6: make non-constexpr (see above) +template <int N> struct QAtomicTraits +{ static Q_DECL_CONSTEXPR inline bool isLockFree() Q_DECL_NOTHROW; }; #define Q_ATOMIC_INT32_IS_SUPPORTED -#define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT32_TEST_AND_SET_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_SOMETIMES_NATIVE +#if ATOMIC_INT_LOCK_FREE == 2 +# define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT32_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_ALWAYS_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<4>::isLockFree() Q_DECL_NOTHROW +{ return true; } +#elif ATOMIC_INT_LOCK_FREE == 1 +# define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_ADD_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT32_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_SOMETIMES_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<4>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#else +# define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_INT_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NEVER_NATIVE +# define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_INT32_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_NEVER_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<4>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#endif -#define Q_ATOMIC_POINTER_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_SOMETIMES_NATIVE -#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_SOMETIMES_NATIVE +#if ATOMIC_POINTER_LOCK_FREE == 2 +# define Q_ATOMIC_POINTER_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE +#elif ATOMIC_POINTER_LOCK_FREE == 1 +# define Q_ATOMIC_POINTER_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_POINTER_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_SOMETIMES_NATIVE +#else +# define Q_ATOMIC_POINTER_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NEVER_NATIVE +#endif template<> struct QAtomicOpsSupport<1> { enum { IsSupported = 1 }; }; -template<> struct QAtomicOpsSupport<2> { enum { IsSupported = 1 }; }; -template<> struct QAtomicOpsSupport<8> { enum { IsSupported = 1 }; }; - #define Q_ATOMIC_INT8_IS_SUPPORTED -#define Q_ATOMIC_INT8_REFERENCE_COUNTING_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT8_TEST_AND_SET_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT8_FETCH_AND_STORE_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT8_FETCH_AND_ADD_IS_ALWAYS_NATIVE +#if ATOMIC_CHAR_LOCK_FREE == 2 +# define Q_ATOMIC_INT8_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT8_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_ADD_IS_ALWAYS_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<1>::isLockFree() Q_DECL_NOTHROW +{ return true; } +#elif ATOMIC_CHAR_LOCK_FREE == 1 +# define Q_ATOMIC_INT8_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT8_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_ADD_IS_SOMETIMES_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<1>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#else +# define Q_ATOMIC_INT8_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_INT8_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_INT8_FETCH_AND_ADD_IS_NEVER_NATIVE +template <> Q_DECL_CONSTEXPR bool QAtomicTraits<1>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#endif + +template<> struct QAtomicOpsSupport<2> { enum { IsSupported = 1 }; }; #define Q_ATOMIC_INT16_IS_SUPPORTED -#define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT16_TEST_AND_SET_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_ALWAYS_NATIVE +#if ATOMIC_SHORT_LOCK_FREE == 2 +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_ALWAYS_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<2>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#elif ATOMIC_SHORT_LOCK_FREE == 1 +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_SOMETIMES_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<2>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#else +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_NEVER_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<2>::isLockFree() Q_DECL_NOTHROW +{ return false; } +#endif #ifndef QT_NO_STD_ATOMIC64 +template<> struct QAtomicOpsSupport<8> { enum { IsSupported = 1 }; }; # define Q_ATOMIC_INT64_IS_SUPPORTED -# define Q_ATOMIC_INT64_REFERENCE_COUNTING_IS_ALWAYS_NATIVE -# define Q_ATOMIC_INT64_TEST_AND_SET_IS_ALWAYS_NATIVE -# define Q_ATOMIC_INT64_FETCH_AND_STORE_IS_ALWAYS_NATIVE -# define Q_ATOMIC_INT64_FETCH_AND_ADD_IS_ALWAYS_NATIVE +# if ATOMIC_LLONG_LOCK_FREE == 2 +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_ALWAYS_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_ALWAYS_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<8>::isLockFree() Q_DECL_NOTHROW +{ return true; } +# elif ATOMIC_LLONG_LOCK_FREE == 1 +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_SOMETIMES_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_SOMETIMES_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<8>::isLockFree() Q_DECL_NOTHROW +{ return false; } +# else +# define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_TEST_AND_SET_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_NEVER_NATIVE +# define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_NEVER_NATIVE + +template <> Q_DECL_CONSTEXPR inline bool QAtomicTraits<8>::isLockFree() Q_DECL_NOTHROW +{ return false; } +# endif #endif template <typename X> struct QAtomicOps @@ -133,7 +257,7 @@ template <typename X> struct QAtomicOps _q_value.store(newValue, std::memory_order_release); } - static inline Q_DECL_CONSTEXPR bool isReferenceCountingNative() Q_DECL_NOTHROW { return true; } + static inline Q_DECL_CONSTEXPR bool isReferenceCountingNative() Q_DECL_NOTHROW { return isTestAndSetNative(); } static inline Q_DECL_CONSTEXPR bool isReferenceCountingWaitFree() Q_DECL_NOTHROW { return false; } template <typename T> static inline bool ref(std::atomic<T> &_q_value) @@ -147,7 +271,8 @@ template <typename X> struct QAtomicOps return --_q_value != 0; } - static inline Q_DECL_CONSTEXPR bool isTestAndSetNative() Q_DECL_NOTHROW { return false; } + static inline Q_DECL_CONSTEXPR bool isTestAndSetNative() Q_DECL_NOTHROW + { return QAtomicTraits<sizeof(X)>::isLockFree(); } static inline Q_DECL_CONSTEXPR bool isTestAndSetWaitFree() Q_DECL_NOTHROW { return false; } template <typename T> @@ -186,7 +311,7 @@ template <typename X> struct QAtomicOps return tmp; } - static inline Q_DECL_CONSTEXPR bool isFetchAndStoreNative() Q_DECL_NOTHROW { return false; } + static inline Q_DECL_CONSTEXPR bool isFetchAndStoreNative() Q_DECL_NOTHROW { return isTestAndSetNative(); } static inline Q_DECL_CONSTEXPR bool isFetchAndStoreWaitFree() Q_DECL_NOTHROW { return false; } template <typename T> @@ -213,7 +338,7 @@ template <typename X> struct QAtomicOps return _q_value.exchange(newValue, std::memory_order_acq_rel); } - static inline Q_DECL_CONSTEXPR bool isFetchAndAddNative() Q_DECL_NOTHROW { return false; } + static inline Q_DECL_CONSTEXPR bool isFetchAndAddNative() Q_DECL_NOTHROW { return isTestAndSetNative(); } static inline Q_DECL_CONSTEXPR bool isFetchAndAddWaitFree() Q_DECL_NOTHROW { return false; } template <typename T> static inline |