From: Sergey Fedorov <serge.f...@gmail.com> These macros provide a convenient way to n-byte align pointers up and down and check if a pointer is n-byte aligned.
Signed-off-by: Sergey Fedorov <serge.f...@gmail.com> Signed-off-by: Sergey Fedorov <sergey.fedo...@linaro.org> --- include/qemu/osdep.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h index e3bc50b61359..1e3221cbec65 100644 --- a/include/qemu/osdep.h +++ b/include/qemu/osdep.h @@ -161,6 +161,17 @@ extern int daemon(int, int); /* Check if n is a multiple of m */ #define QEMU_IS_ALIGNED(n, m) (((n) % (m)) == 0) +/* n-byte align pointer down */ +#define QEMU_ALIGN_PTR_DOWN(p, n) \ + ((typeof(p))QEMU_ALIGN_DOWN((uintptr_t)(p), (n))) + +/* n-byte align pointer up */ +#define QEMU_ALIGN_PTR_UP(p, n) \ + ((typeof(p))QEMU_ALIGN_UP((uintptr_t)(p), (n))) + +/* Check if pointer p is n-bytes aligned */ +#define QEMU_PTR_IS_ALIGNED(p, n) QEMU_IS_ALIGNED((uintptr_t)(p), (n)) + #ifndef ROUND_UP #define ROUND_UP(n,d) (((n) + (d) - 1) & -(d)) #endif -- 2.8.1
