X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/b1a20beee623c83315c3ce21abc7bcce103c6efb..08bb7015a9e28c5c9d38fe05a6f6644bc21fa527:/utils/macros.h

diff --git a/utils/macros.h b/utils/macros.h
index bc83629..2ca5a06 100644
--- a/utils/macros.h
+++ b/utils/macros.h
@@ -61,16 +61,18 @@
 #define MLIB__STR(x) #x
 #define STR(x) MLIB__STR(x)
 
-/* --- @GLUE@ --- *
+/* --- @GLUE@, @GLUE3@ --- *
  *
  * Arguments:	@x, y@ = two sequences of tokens
+ *		@z@ = a third sequence of tokens
  *
  * Returns:	A single token formed by gluing together the macro-expansions
- *		of @x@ and @y@.
+ *		of @x@ and @y@, and @z@ for @GLUE3@.
  */
 
 #define MLIB__GLUE(x, y) x##y
 #define GLUE(x, y) MLIB__GLUE(x, y)
+#define GLUE3(x, y, z) GLUE(x, MLIB__GLUE(y, z))
 
 /* --- @STATIC_ASSERT@ --- *
  *
@@ -144,6 +146,15 @@
 #define UNQUALIFY(type, p)						\
 	CONVERT_CAREFULLY(type *, const volatile type *, p)
 
+/* --- @EMPTY@ --- *
+ *
+ * Arguments:	---
+ *
+ * Returns:	The empty token sequence.
+ */
+
+#define EMPTY
+
 /* --- @COMMA@ --- *
  *
  * Arguments:	---
@@ -252,10 +263,10 @@
 #  define LAUNDER(x)							\
 	({ __typeof__(x) _y; __asm__("" : "=g"(_y) : "0"(x)); _y; })
 #  define ADMIRE(x)							\
-	({ __asm__("" : : "g"(x)); })
+	({ __asm__("" :: "g"(x)); })
 #  define ADMIRE_BUF(p, sz)						\
-	({ __asm__("" : : "g"(p), "g"(sz)); })
-#  define RELAX do __asm__ __volatile__("" ::: "memory"); while (0)
+	({ __asm__("" :: "m"(*(unsigned char *)p), "g"(sz) : "memory"); })
+#  define RELAX do __asm__(""); while (0)
 #endif
 
 #if CLANG_VERSION_P(3, 3)