diff options
Diffstat (limited to 'Include/pymacro.h')
| -rw-r--r-- | Include/pymacro.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Include/pymacro.h b/Include/pymacro.h index 1dc0c61653..ce1cbefb73 100644 --- a/Include/pymacro.h +++ b/Include/pymacro.h @@ -52,4 +52,18 @@ #define PyDoc_STR(str) "" #endif +/* Below "a" is a power of 2. */ +/* Round down size "n" to be a multiple of "a". */ +#define _Py_SIZE_ROUND_DOWN(n, a) ((size_t)(n) & ~(size_t)((a) - 1)) +/* Round up size "n" to be a multiple of "a". */ +#define _Py_SIZE_ROUND_UP(n, a) (((size_t)(n) + \ + (size_t)((a) - 1)) & ~(size_t)((a) - 1)) +/* Round pointer "p" down to the closest "a"-aligned address <= "p". */ +#define _Py_ALIGN_DOWN(p, a) ((void *)((Py_uintptr_t)(p) & ~(Py_uintptr_t)((a) - 1))) +/* Round pointer "p" up to the closest "a"-aligned address >= "p". */ +#define _Py_ALIGN_UP(p, a) ((void *)(((Py_uintptr_t)(p) + \ + (Py_uintptr_t)((a) - 1)) & ~(Py_uintptr_t)((a) - 1))) +/* Check if pointer "p" is aligned to "a"-bytes boundary. */ +#define _Py_IS_ALIGNED(p, a) (!((Py_uintptr_t)(p) & (Py_uintptr_t)((a) - 1))) + #endif /* Py_PYMACRO_H */ |