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authorMarti Bolivar <mbolivar@leaflabs.com>2012-02-02 02:27:14 -0500
committerMarti Bolivar <mbolivar@leaflabs.com>2012-04-11 16:56:53 -0400
commit9cf4afdd74a280e5aaaa700ffdcbe587631c85ae (patch)
treebf0765e392d96eda4d09a37479b0587e5d78d814
parentf7c1bd5f584aed14361979d5a536365a5ad35f8f (diff)
downloadlibrambutan-9cf4afdd74a280e5aaaa700ffdcbe587631c85ae.tar.gz
librambutan-9cf4afdd74a280e5aaaa700ffdcbe587631c85ae.zip
libmaple_types.h: Add offsetof().
Rather than rely on newlib's stddef.h, define our own offsetof() in terms of GCC's __builtin_offsetof(). Don't override an existing offsetof() definition, in case the user already has one they prefer. Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
-rw-r--r--libmaple/include/libmaple/libmaple_types.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/libmaple/include/libmaple/libmaple_types.h b/libmaple/include/libmaple/libmaple_types.h
index ae01691..19a5101 100644
--- a/libmaple/include/libmaple/libmaple_types.h
+++ b/libmaple/include/libmaple/libmaple_types.h
@@ -27,7 +27,7 @@
/**
* @file libmaple_types.h
*
- * @brief libmaple types
+ * @brief libmaple's types, and operations on types.
*/
#ifndef _LIBMAPLE_LIBMAPLE_TYPES_H_
@@ -57,6 +57,10 @@ typedef void (*voidFuncPtr)(void);
#define NULL 0
#endif
+#ifndef offsetof
+#define offsetof(type, member) __builtin_offsetof(type, member)
+#endif
+
#ifdef __cplusplus
}
#endif