util: add G_SIZEOF_MEMBER() macro

I am (overly?) optimistic this macro will be added to glib:
https://gitlab.gnome.org/GNOME/glib/merge_requests/1333

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/util.h b/src/util.h
index 3c6223c..e9c3073 100644
--- a/src/util.h
+++ b/src/util.h
@@ -61,6 +61,10 @@
     })
 #endif
 
+#ifndef G_SIZEOF_MEMBER
+#define G_SIZEOF_MEMBER(type, member) sizeof(((type *)0)->member)
+#endif
+
 #if defined(_WIN32) /* CONFIG_IOVEC */
 #if !defined(IOV_MAX) /* XXX: to avoid duplicate with QEMU osdep.h */
 struct iovec {