I had a force stay in a mental hospital not for suicide but for getting angry at my father. I was driven to the airport (with police escort) and flown to a city airport, and driven in the back of a police car to the hospital. Opon arrival I was told sternly to strip and change into a hospital gown and man handled into a padded sell where I was instructed if I didn't take the medication offered I would stay in the cell until I took it.
Once everything blew over and they saw I wasn't a dander I was slowly given privileges until I was allowed into general population and shared a room with a couple of other guys.
Once things totally relaxed we were allowed to walk the grounds and in my case I was allowed to leave the grounds under a strict curfew.
We had television, visitor rights and phone calls, a pool table and a common kitchen and toilets for each sex.
So yeh it depended on the severity of your case as to how you got treated (that was in Australia)