diff options
author | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2019-12-08 23:47:10 +0100 |
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committer | Tor Arne Vestbø <tor.arne.vestbo@qt.io> | 2019-12-10 00:48:07 +0100 |
commit | c3bd5ffdc8a3b459f18ba6e35fca93e29f3b0ab0 (patch) | |
tree | 24d4c1350b6a08d35396377e83301bda3b4addb4 /src/corelib/thread | |
parent | 191ac31598ccc9d7c8a2c83730755714f903b7ca (diff) |
Don't wrap feature detection macros with QT_HAS_FOO() variants
Using wrappers for these macros is problematic when for example passing the
-frewrite-includes flag to preprocess sources before shipping off to distcc
or Icecream. It will also start producing warnings when compilers implement
http://eel.is/c++draft/cpp.cond#7.sentence-2. See for example
https://reviews.llvm.org/D49091
Both https://clang.llvm.org/docs/LanguageExtensions.html and the SD-6 document at
https://isocpp.org/std/standing-documents/sd-6-sg10-feature-test-recommendations
recommend defining '__has_foo(x) 0' as a fallback for compilers without the
macros, so that's what we go for.
Change-Id: I0298cd3b4a6ff6618821e34642a5ddd6728be767
Reviewed-by: Alex Richardson <arichardson.kde@gmail.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/thread')
-rw-r--r-- | src/corelib/thread/qfutex_p.h | 4 | ||||
-rw-r--r-- | src/corelib/thread/qmutex.h | 10 |
2 files changed, 7 insertions, 7 deletions
diff --git a/src/corelib/thread/qfutex_p.h b/src/corelib/thread/qfutex_p.h index 7bec4554b7..f287b752d7 100644 --- a/src/corelib/thread/qfutex_p.h +++ b/src/corelib/thread/qfutex_p.h @@ -81,7 +81,7 @@ QT_END_NAMESPACE // if not defined in linux/futex.h # define FUTEX_PRIVATE_FLAG 128 // added in v2.6.22 -# if QT_HAS_FEATURE(thread_sanitizer) || defined(__SANITIZE_THREAD__) +# if __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__) # include <sanitizer/tsan_interface.h> inline void _q_tsan_acquire(void *addr, void *addr2) { @@ -98,7 +98,7 @@ inline void _q_tsan_release(void *addr, void *addr2) # else inline void _q_tsan_acquire(void *, void *) {} inline void _q_tsan_release(void *, void *) {} -# endif // QT_HAS_FEATURE(thread_sanitizer) || defined(__SANITIZE_THREAD__) +# endif // __has_feature(thread_sanitizer) || defined(__SANITIZE_THREAD__) QT_BEGIN_NAMESPACE namespace QtLinuxFutex { diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h index c693ff65d8..93c4bf23e8 100644 --- a/src/corelib/thread/qmutex.h +++ b/src/corelib/thread/qmutex.h @@ -44,7 +44,7 @@ #include <QtCore/qatomic.h> #include <new> -#if QT_HAS_INCLUDE(<chrono>) +#if __has_include(<chrono>) # include <chrono> # include <limits> #endif @@ -147,7 +147,7 @@ public: // Lockable concept bool try_lock() QT_MUTEX_LOCK_NOEXCEPT { return tryLock(); } -#if QT_HAS_INCLUDE(<chrono>) || defined(Q_CLANG_QDOC) +#if __has_include(<chrono>) || defined(Q_CLANG_QDOC) // TimedLockable concept template <class Rep, class Period> bool try_lock_for(std::chrono::duration<Rep, Period> duration) @@ -175,7 +175,7 @@ private: friend class QRecursiveMutex; friend class ::tst_QMutex; -#if QT_HAS_INCLUDE(<chrono>) +#if __has_include(<chrono>) template<class Rep, class Period> static int convertToMilliseconds(std::chrono::duration<Rep, Period> duration) { @@ -213,7 +213,7 @@ public: using QMutex::tryLock; using QMutex::unlock; using QMutex::try_lock; -#if QT_HAS_INCLUDE(<chrono>) +#if __has_include(<chrono>) using QMutex::try_lock_for; using QMutex::try_lock_until; #endif @@ -295,7 +295,7 @@ public: inline void unlock() noexcept {} inline bool isRecursive() const noexcept { return true; } -#if QT_HAS_INCLUDE(<chrono>) +#if __has_include(<chrono>) template <class Rep, class Period> inline bool try_lock_for(std::chrono::duration<Rep, Period> duration) noexcept { |