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authorAlan Modra <amodra@gmail.com>2001-09-18 09:59:28 +0000
committerAlan Modra <amodra@gmail.com>2001-09-18 09:59:28 +0000
commitae81c75ec38592694a03884eb41d571733a56cd7 (patch)
treeebac68aacaf6393665c538d98ac8233af22e030e
parentdc810e3900d47ab2eea86d50231ff2e70b596847 (diff)
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* objalloc.h (OBJALLOC_ALIGN): Define using offsetof.
-rw-r--r--include/ChangeLog4
-rw-r--r--include/objalloc.h11
2 files changed, 9 insertions, 6 deletions
diff --git a/include/ChangeLog b/include/ChangeLog
index 6c25ae3..f77ca19 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2001-09-18 Alan Modra <amodra@bigpond.net.au>
+
+ * objalloc.h (OBJALLOC_ALIGN): Define using offsetof.
+
2001-09-17 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
* libiberty.h (concat_length, concat_copy, concat_copy2,
diff --git a/include/objalloc.h b/include/objalloc.h
index 0b451cd..c710647 100644
--- a/include/objalloc.h
+++ b/include/objalloc.h
@@ -1,5 +1,5 @@
/* objalloc.h -- routines to allocate memory for objects
- Copyright 1997 Free Software Foundation, Inc.
+ Copyright 1997, 2001 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Solutions.
This program is free software; you can redistribute it and/or modify it
@@ -56,12 +56,11 @@ struct objalloc_align { char x; double d; };
#ifndef offsetof
#include <stddef.h>
#endif
-#define OBJALLOC_ALIGN \
- ((ptrdiff_t) ((char *) &((struct objalloc_align *) 0)->d - (char *) 0))
-#else
-#define OBJALLOC_ALIGN \
- ((long) ((char *) &((struct objalloc_align *) 0)->d - (char *) 0))
#endif
+#ifndef offsetof
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+#define OBJALLOC_ALIGN offsetof (struct objalloc_align, d)
/* Create an objalloc structure. Returns NULL if malloc fails. */