nobu	2012-02-10 01:29:08 +0900 (Fri, 10 Feb 2012)

  New Revision: 34521

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=34521

  Log:
    * ext/dl/dl.h (DLALIGN): round up at once and get rid of overflow.

  Modified files:
    trunk/ChangeLog
    trunk/ext/dl/dl.h

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 34520)
+++ ChangeLog	(revision 34521)
@@ -1,3 +1,7 @@
+Fri Feb 10 01:29:05 2012  Nobuyoshi Nakada  <nobu@r...>
+
+	* ext/dl/dl.h (DLALIGN): round up at once and get rid of overflow.
+
 Fri Feb 10 00:47:07 2012  Nobuyoshi Nakada  <nobu@r...>
 
 	* test/ruby/envutil.rb (assert_no_memory_leak): new assertion to
Index: ext/dl/dl.h
===================================================================
--- ext/dl/dl.h	(revision 34520)
+++ ext/dl/dl.h	(revision 34521)
@@ -155,9 +155,8 @@
 #define ALIGN_FLOAT  (sizeof(s_float) - sizeof(float))
 #define ALIGN_DOUBLE (sizeof(s_double) - sizeof(double))
 
-#define DLALIGN(ptr,offset,align) {\
-  while( (((unsigned long)((char *)(ptr) + (offset))) % (align)) != 0 ) (offset)++;\
-}
+#define DLALIGN(ptr,offset,align) \
+    ((offset) += ((align) - ((uintptr_t)((char *)(ptr) + (offset))) % (align)) % (align))
 
 
 #define DLTYPE_VOID  0

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