diff options
| author | Thiago Macieira <thiago.macieira@intel.com> | 2012-03-26 10:31:58 -0300 |
|---|---|---|
| committer | Qt by Nokia <qt-info@nokia.com> | 2012-03-27 16:51:30 +0200 |
| commit | a861463c3c7a216632ae81a90e085fb99579d544 (patch) | |
| tree | 98718cfe73d65cfcd6375027f1cb29b89793e30b /src/corelib/global | |
| parent | 2c4845ce331e5dfaf5e106f74871ce16721a1358 (diff) | |
Add a Q_NORETURN macro to mark a function that never returns
This is implemented for GCC, ICC, Clang and MSVC. With this macro, the
compiler can generate better code because it knows that the function
being called will not return.
Change-Id: Iea2bc7be464606639be65ccb73911d7ed1b29a64
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
Diffstat (limited to 'src/corelib/global')
| -rw-r--r-- | src/corelib/global/qcompilerdetection.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h index c9f59454b2..a043e5e072 100644 --- a/src/corelib/global/qcompilerdetection.h +++ b/src/corelib/global/qcompilerdetection.h @@ -90,6 +90,7 @@ # define Q_DECL_ALIGN(n) __declspec(align(n)) # define Q_ASSUME(expr) __assume(expr) # define Q_UNREACHABLE() __assume(0) +# define Q_NORETURN __declspec(noreturn) /* Intel C++ disguising as Visual C++: the `using' keyword avoids warnings */ # if defined(__INTEL_COMPILER) # define Q_CC_INTEL @@ -161,6 +162,7 @@ # define Q_DECL_ALIGN(n) __attribute__((__aligned__(n))) # define Q_LIKELY(expr) __builtin_expect(!!(expr), true) # define Q_UNLIKELY(expr) __builtin_expect(!!(expr), false) +# define Q_NORETURN __attribute__((__noreturn__)) # if !defined(QT_MOC_CPP) # define Q_PACKED __attribute__ ((__packed__)) # define Q_NO_PACKED_REFERENCE @@ -395,6 +397,10 @@ # error "Qt has not been tested with this compiler - see http://www.qt-project.org/" #endif +#ifndef Q_NORETURN +# define Q_NORETURN +#endif + /* * C++11 support * |