diff options
Diffstat (limited to 'scripts/atomic/fallbacks/fetch_add_unless')
| -rwxr-xr-x | scripts/atomic/fallbacks/fetch_add_unless | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/fetch_add_unless b/scripts/atomic/fallbacks/fetch_add_unless new file mode 100755 index 0000000000..8db7e9e17f --- /dev/null +++ b/scripts/atomic/fallbacks/fetch_add_unless @@ -0,0 +1,10 @@ +cat << EOF + ${int} c = raw_${atomic}_read(v); + + do { + if (unlikely(c == u)) + break; + } while (!raw_${atomic}_try_cmpxchg(v, &c, c + a)); + + return c; +EOF |