[dotgnu-pnet-commits] [SCM] DotGNU Portable.NET engine, compilers and tools (pnet) branch, master, updated. 6d9f56bc2e4b3764b14e720fca69b3b62f635e1f

[Klaus Treichel]

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- Log -----------------------------------------------------------------
http://git.savannah.gnu.org/cgit/pnet.git/commit/?id=6d9f56bc2e4b3764b14e720fca69b3b62f635e1f

commit 6d9f56bc2e4b3764b14e720fca69b3b62f635e1f
Author: Klaus Treichel <address@hidden>
Date:   Wed Jan 5 15:41:12 2011 +0100

    Use offsetof to determine the alignment of the      types if available in
    il_align.h.

diff --git a/ChangeLog b/ChangeLog
index 88330a3..d6cbb2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,9 @@
        * engine/amd64_codegen.h (amd64_alu_reg_imm_size): Replace check for
        reg == X86_EAX with reg == AMD64_RAX.
 
+       * include/il_align.h: Use offsetof to determine the alignment of the
+       types if available.
+
 2011-01-04  Klaus Treichel  <address@hidden>
 
        * engine/cvm.c: Make the interpreter loop variables volatile again
diff --git a/include/il_align.h b/include/il_align.h
index dd128a2..5bfe61e 100644
--- a/include/il_align.h
+++ b/include/il_align.h
@@ -22,6 +22,9 @@
 #define        _IL_ALIGN_H
 
 #include "il_values.h"
+#ifdef HAVE_STDDEF_H
+#include <stddef.h>
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,7 +33,8 @@ extern        "C" {
 /*
  * The following is some macro magic that attempts to detect
  * the best alignment to use on the target platform.  The final
- * value, "IL_BEST_ALIGNMENT", will be a compile-time constant.
+ * value, "IL_BEST_ALIGNMENT", will be a compile-time constant if
+ * the offsetof macro is available.
  */
 
 #define        _IL_ALIGN_CHECK_TYPE(type,name) \
@@ -39,8 +43,13 @@ extern       "C" {
                type field; \
        }
 
+#ifdef offsetof
+#define _IL_ALIGN_FOR_TYPE(name)       \
+       (offsetof(struct _IL_align_##name, field))
+#else
 #define        _IL_ALIGN_FOR_TYPE(name)        \
        ((ILNativeUInt)(&(((struct _IL_align_##name *)0)->field)))
+#endif
 
 #define        _IL_ALIGN_MAX(a,b)      \
        ((a) > (b) ? (a) : (b))

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog          |    3 +++
 include/il_align.h |   11 ++++++++++-
 2 files changed, 13 insertions(+), 1 deletions(-)


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