관리-도구

편집 파일: fetch_add_unless

cat << EOF /** * arch_${atomic}_fetch_add_unless - add unless the number is already a given value * @v: pointer of type ${atomic}_t * @a: the amount to add to v... * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as @v was not already @u. * Returns original value of @v */ static __always_inline ${int} arch_${atomic}_fetch_add_unless(${atomic}_t *v, ${int} a, ${int} u) { ${int} c = arch_${atomic}_read(v); do { if (unlikely(c == u)) break; } while (!arch_${atomic}_try_cmpxchg(v, &c, c + a)); return c; } EOF