bus-message: add macro for calculation of offset from the page

2020-06-22 17:18:35 +02:00
parent b17af3e503
commit b98f393d88
2 changed files with 2 additions and 1 deletions
@@ -13,6 +13,7 @@
 size_t page_size(void) _pure_;
 #define PAGE_ALIGN(l) ALIGN_TO((l), page_size())
 #define PAGE_ALIGN_DOWN(l) ((l) & ~(page_size() - 1))
+#define PAGE_OFFSET(l) ((l) & (page_size() - 1))

 /* Normal memcpy requires src to be nonnull. We do nothing if n is 0. */
 static inline void memcpy_safe(void *dst, const void *src, size_t n) {