X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fmem%2Fmem.h;h=dd66cc62cd8cce990aeac17da41962aa2bf74a74;hp=99c34c0a39719ec0a262add21e74bab5b99a8e56;hb=428d3b0217b32892c2fd309358619a4877113833;hpb=8f6126000bfebc71f566ce56387f86fcd567e2c7;ds=sidebyside

diff --git a/ccan/mem/mem.h b/ccan/mem/mem.h
index 99c34c0a..dd66cc62 100644
--- a/ccan/mem/mem.h
+++ b/ccan/mem/mem.h
@@ -217,4 +217,14 @@ static inline bool memoverlaps(const void *a_, size_t al,
 	return (a < (b + bl)) && (b < (a + al));
 }
 
+/*
+ * memswap - Exchange two memory regions
+ * @a: first region
+ * @b: second region
+ * @n: length of the regions
+ *
+ * Undefined results if the two memory regions overlap.
+ */
+void memswap(void *a, void *b, size_t n);
+
 #endif /* CCAN_MEM_H */