diff options
Diffstat (limited to 'internal.h')
| -rw-r--r-- | internal.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/internal.h b/internal.h index 9075d16360..0d5c952158 100644 --- a/internal.h +++ b/internal.h @@ -77,6 +77,9 @@ extern "C" { # define __has_extension __has_feature #endif +/* Prevent compiler from reordering access */ +#define ACCESS_ONCE(type,x) (*((volatile type *)&(x))) + #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) # define STATIC_ASSERT(name, expr) _Static_assert(expr, #name ": " #expr) #elif GCC_VERSION_SINCE(4, 6, 0) || __has_extension(c_static_assert) |