src/common/align.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2010 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #ifndef _BABELTRACE_ALIGN_H
   8 #define _BABELTRACE_ALIGN_H
   9
  10 #include "compat/compiler.h"
  11 #include "compat/limits.h"
  12
  13 #define BT_ALIGN(x, a)          __BT_ALIGN_MASK(x, (__typeof__(x))(a) - 1)
  14 #define __BT_ALIGN_MASK(x, mask)        (((x) + (mask)) & ~(mask))
  15 #define BT_PTR_ALIGN(p, a)              ((__typeof__(p)) BT_ALIGN((unsigned long) (p), a))
  16 #define BT_ALIGN_FLOOR(x, a)    __BT_ALIGN_FLOOR_MASK(x, (__typeof__(x)) (a) - 1)
  17 #define __BT_ALIGN_FLOOR_MASK(x, mask)  ((x) & ~(mask))
  18 #define BT_PTR_ALIGN_FLOOR(p, a) \
  19                         ((__typeof__(p)) BT_ALIGN_FLOOR((unsigned long) (p), a))
  20 #define BT_IS_ALIGNED(x, a)     (((x) & ((__typeof__(x)) (a) - 1)) == 0)
  21
  22 #endif /* _BABELTRACE_ALIGN_H */