diff options
Diffstat (limited to '')
-rwxr-xr-x | scripts/atomic/fallbacks/dec | 7 | ||||
-rwxr-xr-x | scripts/atomic/fallbacks/dec_and_test | 15 | ||||
-rwxr-xr-x | scripts/atomic/fallbacks/dec_if_positive | 15 | ||||
-rwxr-xr-x | scripts/atomic/fallbacks/dec_unless_positive | 14 |
4 files changed, 51 insertions, 0 deletions
diff --git a/scripts/atomic/fallbacks/dec b/scripts/atomic/fallbacks/dec new file mode 100755 index 000000000..e2e01f057 --- /dev/null +++ b/scripts/atomic/fallbacks/dec @@ -0,0 +1,7 @@ +cat <<EOF +static __always_inline ${ret} +${arch}${atomic}_${pfx}dec${sfx}${order}(${atomic}_t *v) +{ + ${retstmt}${arch}${atomic}_${pfx}sub${sfx}${order}(1, v); +} +EOF diff --git a/scripts/atomic/fallbacks/dec_and_test b/scripts/atomic/fallbacks/dec_and_test new file mode 100755 index 000000000..e8a5e492e --- /dev/null +++ b/scripts/atomic/fallbacks/dec_and_test @@ -0,0 +1,15 @@ +cat <<EOF +/** + * ${arch}${atomic}_dec_and_test - decrement and test + * @v: pointer of type ${atomic}_t + * + * Atomically decrements @v by 1 and + * returns true if the result is 0, or false for all other + * cases. + */ +static __always_inline bool +${arch}${atomic}_dec_and_test(${atomic}_t *v) +{ + return ${arch}${atomic}_dec_return(v) == 0; +} +EOF diff --git a/scripts/atomic/fallbacks/dec_if_positive b/scripts/atomic/fallbacks/dec_if_positive new file mode 100755 index 000000000..527adec89 --- /dev/null +++ b/scripts/atomic/fallbacks/dec_if_positive @@ -0,0 +1,15 @@ +cat <<EOF +static __always_inline ${ret} +${arch}${atomic}_dec_if_positive(${atomic}_t *v) +{ + ${int} dec, c = ${arch}${atomic}_read(v); + + do { + dec = c - 1; + if (unlikely(dec < 0)) + break; + } while (!${arch}${atomic}_try_cmpxchg(v, &c, dec)); + + return dec; +} +EOF diff --git a/scripts/atomic/fallbacks/dec_unless_positive b/scripts/atomic/fallbacks/dec_unless_positive new file mode 100755 index 000000000..dcab6848c --- /dev/null +++ b/scripts/atomic/fallbacks/dec_unless_positive @@ -0,0 +1,14 @@ +cat <<EOF +static __always_inline bool +${arch}${atomic}_dec_unless_positive(${atomic}_t *v) +{ + ${int} c = ${arch}${atomic}_read(v); + + do { + if (unlikely(c > 0)) + return false; + } while (!${arch}${atomic}_try_cmpxchg(v, &c, c - 1)); + + return true; +} +EOF |