Neat!
Acked-by: Jarno Rajahalme <jrajaha...@nicira.com>
> On Jul 29, 2015, at 11:42 PM, Ben Pfaff <b...@nicira.com> wrote:
>
> To be used in an upcoming commit.
>
> Signed-off-by: Ben Pfaff <b...@nicira.com>
> ---
> lib/ofpbuf.h | 21 ++++++++++++++++++++-
> 1 file changed, 20 insertions(+), 1 deletion(-)
>
> diff --git a/lib/ofpbuf.h b/lib/ofpbuf.h
> index b30cbdb..9e82de2 100644
> --- a/lib/ofpbuf.h
> +++ b/lib/ofpbuf.h
> @@ -1,5 +1,5 @@
> /*
> - * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
> + * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2015 Nicira, Inc.
> *
> * Licensed under the Apache License, Version 2.0 (the "License");
> * you may not use this file except in compliance with the License.
> @@ -64,6 +64,25 @@ struct ofpbuf {
> enum ofpbuf_source source; /* Source of memory allocated as 'base'. */
> };
>
> +/* An initializer for a struct ofpbuf that will be initially empty and
> + * uses the space in STUB (which should be an array) as a stub.
> + *
> + * Usage example:
> + *
> + * uint64_t stub[1024 / 8]; // 1 kB stub properly aligned for 64-bit
> data.
> + * struct ofpbuf ofpbuf = OFPBUF_STUB_INITIALIZER(stub);
> + */
> +#define OFPBUF_STUB_INITIALIZER(STUB) { \
> + .base = (STUB), \
> + .data = (STUB), \
> + .size = 0, \
> + .allocated = sizeof (STUB), \
> + .header = NULL, \
> + .msg = NULL, \
> + .list_node = OVS_LIST_POISON, \
> + .source = OFPBUF_STUB, \
> + }
> +
> void ofpbuf_use(struct ofpbuf *, void *, size_t);
> void ofpbuf_use_stack(struct ofpbuf *, void *, size_t);
> void ofpbuf_use_stub(struct ofpbuf *, void *, size_t);
> --
> 2.1.3
>
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