OpenCloudOS-Kernel/scripts/atomic/fallbacks/dec_if_positive

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cat <<EOF
static inline ${ret}
${atomic}_dec_if_positive(${atomic}_t *v)
{
${int} dec, c = ${atomic}_read(v);
do {
dec = c - 1;
if (unlikely(dec < 0))
break;
} while (!${atomic}_try_cmpxchg(v, &c, dec));
return dec;
}
EOF