lkml.org 
[lkml]   [2016]   [Nov]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [RFC][PATCH 2/7] kref: Add kref_read()
Date
> By the way, there are several sites where the use of
> atomic_t/atomic_wrap_t as a counter ventures beyond the standard (inc,
> dec, add, sub, read, set) operations we're planning on implementing
> for both refcount_t and stats_t.

Speaking of non-fitting patterns. This one is quite common in networking code for refcounters:

if (atomic_cmpxchg(&cur->refcnt, 1, 0) == 1) {}
This is from net/netfilter/nfnetlink_acct.c, but there are similar ones in other places.

Also, simple atomic_dec() is used pretty much everywhere for counters, which we don’t have a straight match in refcount_t API.

\
 
 \ /
  Last update: 2016-11-21 16:40    [W:0.151 / U:0.168 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site