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| author | glebius <glebius@FreeBSD.org> | 2015-02-17 19:32:11 +0000 |
|---|---|---|
| committer | glebius <glebius@FreeBSD.org> | 2015-02-17 19:32:11 +0000 |
| commit | 8de94edb0dafe01ef92c1342b0bbaa3b1c216d61 (patch) | |
| tree | bb4b28514b271f3f425d29cb7d6bd92469d15c77 /sys/sys/mbuf.h | |
| parent | 557c602e55ae9ccce10a6ec3f9e9fe16334bdfe1 (diff) | |
| download | FreeBSD-src-8de94edb0dafe01ef92c1342b0bbaa3b1c216d61.zip FreeBSD-src-8de94edb0dafe01ef92c1342b0bbaa3b1c216d61.tar.gz | |
Use anonymous unions to add possibility to put mbufs into queue(3)
STAILQs and SLISTs using the same structure field as good old m_next
and m_nextpkt linkage occupy.
New code is encouraged to use queue(3) macros, instead of implementing
the wheel. However, better not to have a mixture of old style and
queue(3) in one file or subsystem.
Reviewed by: rwatson, rrs, rpaulo
Differential Revision: D1499
Diffstat (limited to 'sys/sys/mbuf.h')
| -rw-r--r-- | sys/sys/mbuf.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h index 2e94d2a..4729320 100644 --- a/sys/sys/mbuf.h +++ b/sys/sys/mbuf.h @@ -184,8 +184,16 @@ struct mbuf { * Compile-time assertions in uipc_mbuf.c test these values to ensure * that they are correct. */ - struct mbuf *m_next; /* next buffer in chain */ - struct mbuf *m_nextpkt; /* next chain in queue/record */ + union { /* next buffer in chain */ + struct mbuf *m_next; + SLIST_ENTRY(mbuf) m_slist; + STAILQ_ENTRY(mbuf) m_stailq; + }; + union { /* next chain in queue/record */ + struct mbuf *m_nextpkt; + SLIST_ENTRY(mbuf) m_slistpkt; + STAILQ_ENTRY(mbuf) m_stailqpkt; + }; caddr_t m_data; /* location of data */ int32_t m_len; /* amount of data in this mbuf */ uint32_t m_type:8, /* type of data in this mbuf */ |
