summaryrefslogtreecommitdiffstats
path: root/src
diff options
context:
space:
mode:
authorBrian Paul <[email protected]>2011-11-28 18:13:43 -0700
committerBrian Paul <[email protected]>2011-11-30 06:57:36 -0700
commit15be8b4bf01a4f01b2afcea82bd042f3a98b9ac1 (patch)
tree0d8a9031812d346a2bf6ef400fda03b58187190d /src
parent25c8a112abf4bbf271c6972f7539ca2a1c7683bd (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')
-rw-r--r--src/mesa/main/compiler.h12
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