sys/kern/kern_descrip.c

2045 	struct filedesc_to_leader *fdtol;
2054 	fdtol = p->p_fdtol;
2055 	MPASS(fdtol != NULL);
2058 	KASSERT(fdtol->fdl_refcount > 0,
2060 	    fdtol->fdl_refcount));
2061 	if (fdtol->fdl_refcount == 1 &&
2082 	if (fdtol->fdl_refcount == 1) {
2094 		if (fdtol->fdl_holdcount > 0) {
2096 			 * Ensure that fdtol->fdl_leader remains
2099 			fdtol->fdl_wakeup = 1;
2100 			sx_sleep(fdtol, FILEDESC_LOCK(fdp), PLOCK,
2105 	fdtol->fdl_refcount--;
2106 	if (fdtol->fdl_refcount == 0 &&
2107 	    fdtol->fdl_holdcount == 0) {
2108 		fdtol->fdl_next->fdl_prev = fdtol->fdl_prev;
2109 		fdtol->fdl_prev->fdl_next = fdtol->fdl_next;
2111 		fdtol = NULL;
2114 	if (fdtol != NULL)
2115 		free(fdtol, M_FILEDESC_TO_LEADER);
2366 	struct filedesc_to_leader *fdtol;
2391 		fdtol = td->td_proc->p_fdtol;
2392 		if (fdtol != NULL) {
2399 			for (fdtol = fdtol->fdl_next;
2400 			    fdtol != td->td_proc->p_fdtol;
2401 			    fdtol = fdtol->fdl_next) {
2402 				if ((fdtol->fdl_leader->p_flag &
2405 				fdtol->fdl_holdcount++;
2413 				    (caddr_t)fdtol->fdl_leader, F_UNLCK, &lf,
2416 				fdtol->fdl_holdcount--;
2417 				if (fdtol->fdl_holdcount == 0 &&
2418 				    fdtol->fdl_wakeup != 0) {
2419 					fdtol->fdl_wakeup = 0;
2420 					wakeup(fdtol);
3135 	struct filedesc_to_leader *fdtol;
3137 	fdtol = malloc(sizeof(struct filedesc_to_leader),
3139 	fdtol->fdl_refcount = 1;
3140 	fdtol->fdl_holdcount = 0;
3141 	fdtol->fdl_wakeup = 0;
3142 	fdtol->fdl_leader = leader;
3145 		fdtol->fdl_next = old->fdl_next;
3146 		fdtol->fdl_prev = old;
3147 		old->fdl_next = fdtol;
3148 		fdtol->fdl_next->fdl_prev = fdtol;
3151 		fdtol->fdl_next = fdtol;
3152 		fdtol->fdl_prev = fdtol;
3154 	return (fdtol);