File: fetch_add_unless

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file content (10 lines) | stat: -rwxr-xr-x 156 bytes parent folder | download | duplicates (20) 
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cat << EOF
	${int} c = raw_${atomic}_read(v);

	do {
		if (unlikely(c == u))
			break;
	} while (!raw_${atomic}_try_cmpxchg(v, &c, c + a));

	return c;
EOF