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