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include: Move endof() up from hw/virtio/virtio.h

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endof() is a useful macro, we can make use of it outside of virtio.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20191011152814.14791-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2019-10-11 17:27:59 +02:00
parent f93c3add3a
commit 5d5b33c080
4 changed files with 14 additions and 14 deletions
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7
include/qemu/compiler.h
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@ -60,6 +60,13 @@
#define sizeof_field(type, field) sizeof(((type *)0)->field)
/*
* Calculate the number of bytes up to and including the given 'field' of
* 'container'.
*/
#define endof(container, field) \
(offsetof(container, field) + sizeof_field(container, field))
/* Convert from a base type to a parent type, with compile time checking. */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \