exislock_t
exislock_t exis; /* existential lock state */
exislock_t exis;
exis_poll(exislock_t *xlk)
exis_state(exislock_t *xlk)
exis_usable(exislock_t *xlk)
exis_freeable(exislock_t *xlk)
exis_cache(exislock_t *xlk, long n)
exis_terminate(exislock_t *xlk)
exis_init(exislock_t *xlk)
exis_setlive(exislock_t *xlk)