diff options
| author | Giuseppe D'Angelo <giuseppe.dangelo@kdab.com> | 2014-03-01 14:12:33 +0100 |
|---|---|---|
| committer | The Qt Project <gerrit-noreply@qt-project.org> | 2014-03-03 23:02:24 +0100 |
| commit | d85983ece7223d733ab87b0b9a8cca3aa246a406 (patch) | |
| tree | e63c9ed8232c20542821ab2c4bc9280fef333432 /src/corelib/global | |
| parent | b72880d213b6ec94dcd9e388a6e648cc9b636194 (diff) | |
Introduce Q_DECL_CONST_FUNCTION and Q_DECL_PURE_FUNCTION
That expand to __attribute__((const)) and ((pure)). A "const" function
is a function allowed to examine only its arguments, without modifying
them. A "pure" function is also allowed to read memory.
Currently working only on GCC/ICC/Clang, MSVC lacks these.
Change-Id: Ie60a0847b193fb88e116f61611dc571296a3df1c
Reviewed-by: Marc Mutz <marc.mutz@kdab.com>
Diffstat (limited to 'src/corelib/global')
| -rw-r--r-- | src/corelib/global/qcompilerdetection.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h index 1eb442aa5f..a9f143502e 100644 --- a/src/corelib/global/qcompilerdetection.h +++ b/src/corelib/global/qcompilerdetection.h @@ -200,6 +200,8 @@ # define Q_UNLIKELY(expr) __builtin_expect(!!(expr), false) # define Q_NORETURN __attribute__((__noreturn__)) # define Q_REQUIRED_RESULT __attribute__ ((__warn_unused_result__)) +# define Q_DECL_PURE_FUNCTION __attribute__((pure)) +# define Q_DECL_CONST_FUNCTION __attribute__((const)) # if !defined(QT_MOC_CPP) # define Q_PACKED __attribute__ ((__packed__)) # ifndef __ARM_EABI__ @@ -975,6 +977,12 @@ #ifndef Q_DECL_NS_RETURNS_AUTORELEASED # define Q_DECL_NS_RETURNS_AUTORELEASED #endif +#ifndef Q_DECL_PURE_FUNCTION +# define Q_DECL_PURE_FUNCTION +#endif +#ifndef Q_DECL_CONST_FUNCTION +# define Q_DECL_CONST_FUNCTION Q_DECL_PURE_FUNCTION +#endif /* Workaround for static const members on MSVC++. |