diff options
| author | Brian Paul <[email protected]> | 2011-11-28 18:13:43 -0700 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2011-11-30 06:57:36 -0700 |
| commit | 15be8b4bf01a4f01b2afcea82bd042f3a98b9ac1 (patch) | |
| tree | 0d8a9031812d346a2bf6ef400fda03b58187190d /src/mesa | |
| parent | 25c8a112abf4bbf271c6972f7539ca2a1c7683bd (diff) | |
mesa: add STATIC_ASSERT() macro for compile-time assertions
This can be used to check that tables have the right number of entries,
etc. at compile-time. This will hopefully catch things that are missed
if particular drivers aren't tested, for example.
v2: Simplify the macro to omit the extra line number info (the compiler
already indicates the line number). And wrap the macro for readability.
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/main/compiler.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/mesa/main/compiler.h b/src/mesa/main/compiler.h index 921e3022288..25d9810538a 100644 --- a/src/mesa/main/compiler.h +++ b/src/mesa/main/compiler.h @@ -310,6 +310,18 @@ static INLINE GLuint CPU_TO_LE32(GLuint x) #endif #endif + +/** + * Static (compile-time) assertion. + * Basically, use COND to dimension an array. If COND is false/zero the + * array size will be -1 and we'll get a compilation error. + */ +#define STATIC_ASSERT(COND) \ + do { \ + typedef int static_assertion_failed[(!!(COND))*2-1]; \ + } while (0) + + #if (__GNUC__ >= 3) #define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a))) #else |