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if /bin/sh ${ATOMICDIR}/chkdup.sh arch_${atomic}_dec_unless_positive dec_unless_positive
then
cat <<EOF
/**
* arch_${atomic}_dec_unless_positive - Atomic decrement if old value is non-positive
* @v: pointer of type ${atomic}_t
*
* Atomically decrement @v with full ordering, but only if the original value is less
* than or equal to zero. Return @true if the decrement happened and
* @false otherwise.
*/
EOF
fi
cat <<EOF
static __always_inline bool
arch_${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
|
