diff options
| author | Sergei Golubchik <sergii@pisem.net> | 2011-07-02 22:08:51 +0200 |
|---|---|---|
| committer | Sergei Golubchik <sergii@pisem.net> | 2011-07-02 22:08:51 +0200 |
| commit | 9809f05199aeb0b67991fac41bd86f38730768dc (patch) | |
| tree | fa2792ff86d0da014b535d743759810612338042 /include/my_compiler.h | |
| parent | 0accbd0364e0333e0b119aa9ce93e34ded9df6cb (diff) | |
| parent | 5a0e7394a5ae0c7b6a1ea35b7ea3a8985325987a (diff) | |
| download | mariadb-git-9809f05199aeb0b67991fac41bd86f38730768dc.tar.gz | |
5.5-merge
Diffstat (limited to 'include/my_compiler.h')
| -rw-r--r-- | include/my_compiler.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/include/my_compiler.h b/include/my_compiler.h index 1cd46ff4260..e3ff80fad40 100644 --- a/include/my_compiler.h +++ b/include/my_compiler.h @@ -32,8 +32,15 @@ /* GNU C/C++ */ #if defined __GNUC__ +/* Convenience macro to test the minimum required GCC version. */ +# define MY_GNUC_PREREQ(maj, min) \ + ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min)) /* Any after 2.95... */ # define MY_ALIGN_EXT +/* Comunicate to the compiler the unreachability of the code. */ +# if MY_GNUC_PREREQ(4,5) +# define MY_ASSERT_UNREACHABLE() __builtin_unreachable() +# endif /* Microsoft Visual C++ */ #elif defined _MSC_VER @@ -67,8 +74,13 @@ #endif /** - Generic compiler-dependent features. + Generic (compiler-independent) features. */ + +#ifndef MY_GNUC_PREREQ +# define MY_GNUC_PREREQ(maj, min) (0) +#endif + #ifndef MY_ALIGNOF # ifdef __cplusplus template<typename type> struct my_alignof_helper { char m1; type m2; }; @@ -79,6 +91,10 @@ # endif #endif +#ifndef MY_ASSERT_UNREACHABLE +# define MY_ASSERT_UNREACHABLE() do { assert(0); } while (0) +#endif + /** C++ Type Traits */ @@ -124,6 +140,14 @@ struct my_aligned_storage #endif /* __cplusplus */ +# ifndef MY_ALIGNED +/* + Make sure MY_ALIGNED can be used also on platforms where we don't + have a way of aligning data structures. +*/ +#define MY_ALIGNED(size) +#endif + #include <my_attribute.h> #endif /* MY_COMPILER_INCLUDED */ |