diff options
Diffstat (limited to 'scripts/atomic/fallbacks/try_cmpxchg')
| -rwxr-xr-x | scripts/atomic/fallbacks/try_cmpxchg | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/try_cmpxchg b/scripts/atomic/fallbacks/try_cmpxchg new file mode 100755 index 000000000..06db0f738 --- /dev/null +++ b/scripts/atomic/fallbacks/try_cmpxchg @@ -0,0 +1,11 @@ +cat <<EOF +static __always_inline bool +${arch}${atomic}_try_cmpxchg${order}(${atomic}_t *v, ${int} *old, ${int} new) +{ + ${int} r, o = *old; + r = ${arch}${atomic}_cmpxchg${order}(v, o, new); + if (unlikely(r != o)) + *old = r; + return likely(r == o); +} +EOF |