Pacify IAR warnings for side-effects.

[bertos.git] / cfg / macros.h

diff --git a/cfg/macros.h b/cfg/macros.h
index 6dd62487dace13b6f4317414ec11194297b2297b..ded2261bd9d64de06631508109a5e8bd293a30bc 100755 (executable)
--- a/cfg/macros.h
+++ b/cfg/macros.h
@@ -2,7 +2,7 @@
  * \file
  * <!--
  * Copyright 2003, 2004 Develer S.r.l. (http://www.develer.com/)
- * This file is part of DevLib - See devlib/README for information.
+ * This file is part of DevLib - See README.devlib for information.
  * -->
  *
  * \brief Common and handy function macros
@@ -14,6 +14,18 @@
 
 /*#*
  *#* $Log$
+ *#* Revision 1.6  2006/02/10 12:36:57  bernie
+ *#* Pacify IAR warnings for side-effects.
+ *#*
+ *#* Revision 1.5  2005/11/04 16:20:01  bernie
+ *#* Fix reference to README.devlib in header.
+ *#*
+ *#* Revision 1.4  2005/07/03 15:19:09  bernie
+ *#* Doxygen fix.
+ *#*
+ *#* Revision 1.3  2005/06/27 21:23:32  bernie
+ *#* ROUND_DOWN, ROUND_UP, ROUND_NEAREST: New macros.
+ *#*
  *#* Revision 1.2  2005/04/11 19:10:27  bernie
  *#* Include top-level headers from cfg/ subdir.
  *#*
@@ -128,7 +140,13 @@
                } while (0)
 #else /* !COMPILER_TYPEOF */
        /* Sub-optimal implementation that only works with integral types. */
-       #define SWAP(a, b) ((a) ^= (b) ^= (a) ^= (b))
+       #define SWAP(a, b) \
+               do { \
+                       (a) ^= (b); \
+                       (b) ^= (a); \
+                       (a) ^= (b); \
+               } while (0)
+
 #endif /* COMPILER_TYPEOF */
 
 #ifndef BV
@@ -139,6 +157,18 @@
 /*! Round up \a x to an even multiple of the 2's power \a pad */
 #define ROUND2(x, pad) (((x) + ((pad) - 1)) & ~((pad) - 1))
 
+/*!
+ * \name Integer round macros.
+ *
+ * Round \a x to a multiple of \a base.
+ * \note If \a x is signed these macros generate a lot of code.
+ * \{
+ */
+#define ROUND_DOWN(x, base)    ( (x) - ((x) % (base)) )
+#define ROUND_UP(x, base)      ( ((x) + (base) - 1) - (((x) + (base) - 1) % (base)) )
+#define ROUND_NEAREST(x, base) ( ((x) + (base) / 2) - (((x) + (base) / 2) % (base)) )
+/* \} */
+
 //! Check if \a x is an integer power of 2
 #define IS_POW2(x)     (!(bool)((x) & ((x)-1)))