diff options
| author | Sverker Eriksson <[email protected]> | 2014-12-16 15:22:07 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2014-12-16 15:22:07 +0100 |
| commit | c4228fb7cb3bd651dd44f8dfd9a4f91f41d5cc2c (patch) | |
| tree | e11aab77ae5383ae16f99cff9003208f32ceb15f /erts/emulator/beam/sys.h | |
| parent | be779dbb921e2f99d1d6f626d32e34053a0635d9 (diff) | |
| parent | b3e52c026ce4920e1a4e36ef98e5de94666e91ef (diff) | |
| download | otp-c4228fb7cb3bd651dd44f8dfd9a4f91f41d5cc2c.tar.gz otp-c4228fb7cb3bd651dd44f8dfd9a4f91f41d5cc2c.tar.bz2 otp-c4228fb7cb3bd651dd44f8dfd9a4f91f41d5cc2c.zip | |
Merge branch 'sverk/ct-assert'
* sverk/ct-assert:
erts: Add compile time assert ERTS_CT_ASSERT
Diffstat (limited to 'erts/emulator/beam/sys.h')
| -rw-r--r-- | erts/emulator/beam/sys.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h index c29d4b3777..7661bf2dc7 100644 --- a/erts/emulator/beam/sys.h +++ b/erts/emulator/beam/sys.h @@ -189,6 +189,22 @@ __decl_noreturn void __noreturn erl_assert_error(const char* expr, const char *f #endif /* + * Compile time assert + * (the actual compiler error msg can be a bit confusing) + */ +#if ERTS_AT_LEAST_GCC_VSN__(3,1,1) +# define ERTS_CT_ASSERT(e) \ + do { \ + enum { compile_time_assert__ = __builtin_choose_expr((e),0,(void)0) }; \ + } while(0) +#else +# define ERTS_CT_ASSERT(e) \ + do { \ + enum { compile_time_assert__ = 1/(e) }; \ + } while (0) +#endif + +/* * Microsoft C/C++: We certainly want to use stdarg.h and prototypes. * But MSC doesn't define __STDC__, unless we compile with the -Za * flag (strict ANSI C, no Microsoft extension). Compiling with -Za |