#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
#endif
+#ifndef PAGE_MASK /* FreeBSD and macOS defines their own PAGE_MASK. */
#define PAGE_MASK (~(PAGE_SIZE - 1))
+#endif
#define __ALIGN_MASK(v, mask) (((v) + (mask)) & ~(mask))
+#ifndef ALIGN /* FreeBSD and macOS defines their own ALIGN. */
#define ALIGN(v, align) __ALIGN_MASK(v, (__typeof__(v)) (align) - 1)
+#endif
#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
/**