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Brooklyn/scripts/atomic/fallbacks/dec_if_positive
2022-04-02 18:24:21 +05:00

16 lines
259 B
Plaintext

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