mtx_trylock
int mtx_trylock(mtx_t *);
if (reclaimable > 0 && mtx_trylock(&txq->lock)) {
if (mtx_trylock(lock)) {
ATF_TC(mtx_trylock);
ATF_TC_HEAD(mtx_trylock, tc)
ATF_TC_BODY(mtx_trylock, tc)
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_success);
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_busy);
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_success);
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_success);
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_busy);
ATF_REQUIRE_EQ(mtx_trylock(&m), thrd_success);
ATF_TP_ADD_TC(tp, mtx_trylock);