diff options
Diffstat (limited to 'scripts/atomic/fallbacks/add_unless')
| -rw-r--r-- | scripts/atomic/fallbacks/add_unless | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/add_unless b/scripts/atomic/fallbacks/add_unless new file mode 100644 index 000000000000..792533885fbf --- /dev/null +++ b/scripts/atomic/fallbacks/add_unless @@ -0,0 +1,16 @@ +cat << EOF +/** + * ${atomic}_add_unless - add unless the number is already a given value + * @v: pointer of type ${atomic}_t + * @a: the amount to add to v... + * @u: ...unless v is equal to u. + * + * Atomically adds @a to @v, if @v was not already @u. + * Returns true if the addition was done. + */ +static inline bool +${atomic}_add_unless(${atomic}_t *v, ${int} a, ${int} u) +{ + return ${atomic}_fetch_add_unless(v, a, u) != u; +} +EOF |