diff options
Diffstat (limited to 'util.h')
| -rw-r--r-- | util.h | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -43,6 +43,9 @@ #define ROUND_DOWN(x, y) ((x) & ~((y) - 1)) #define ROUND_UP(x, y) (((x) + (y) - 1) & ~((y) - 1)) +#define ALIGN_DOWN(n, m) ((n) / (m) * (m)) +#define ALIGN_UP(n, m) ALIGN_DOWN((n) + (m) - 1, (m)) + #define MAX_FROM_BITS(n) (((1U << (n)) - 1)) #define BIT(n) (1UL << (n)) @@ -110,6 +113,14 @@ #define htonl_constant(x) (__bswap_constant_32(x)) #endif +#define barrier() do { __asm__ __volatile__("" ::: "memory"); } while (0) +#define smp_mb() do { barrier(); __atomic_thread_fence(__ATOMIC_SEQ_CST); } while (0) +#define smp_mb_release() do { barrier(); __atomic_thread_fence(__ATOMIC_RELEASE); } while (0) +#define smp_mb_acquire() do { barrier(); __atomic_thread_fence(__ATOMIC_ACQUIRE); } while (0) + +#define smp_wmb() smp_mb_release() +#define smp_rmb() smp_mb_acquire() + #define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 8) int do_clone(int (*fn)(void *), char *stack_area, size_t stack_size, int flags, void *arg); |