|
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
|