cnd_init
int cnd_init(cnd_t *);
RT(cnd_init(&cnd));
RT(cnd_init(&cnd));
ATF_REQUIRE_EQ(cnd_init(&c), thrd_success);
ATF_TP_ADD_TC(tp, cnd_init);
ATF_TC(cnd_init);
ATF_TC_HEAD(cnd_init, tc)
ATF_TC_BODY(cnd_init, tc)
ATF_REQUIRE_EQ(cnd_init(&c), thrd_success);
ATF_REQUIRE_EQ(cnd_init(&b_c), thrd_success);