I still am learning about the functions so I can't say from that perspective. However, I can explain the process that happens when I do door slam.
In my experience. The only things that makes me door slam are:
I feel that my qualities of helping are being used - It feels
very one sided and then, I get
very honest and bluntly say what the person needs to stop feeling that way whereas before I try to gently guide it. (I can get blunt when I feel it's one sided. I especially do get blunt when the person is savouring in that 'negative' spotlight)
-negative spotlight/attention/something: - wanting sympathy and needing sympathy are two completely different things!!
Sure, personal situations can affect if someone is seeking sympathy for something unrelated to what is causing them pain. I do like figuring it out (sounds maybe a bit retarded) and then I actively work on healing that,
but!! if someone close to me savours in it for a long time (and
only wants my sympathy
all the time) & there is
nothing wrong other than just needing that 'aw' repeatedly! Note this though, this is my guilt talking - I get guilty when I feel like I need to weigh pain. To me its incorrect (who am I to judge) but then sometimes some people just seek to create it and refuse to deal with it while putting it on me & expect me to fix and literally heal everything.
At times I do wonder if it's learned behaviour or if it's an attachment thing - e.g. 'lets go to puzznuzz and get her to give me sympathy to see if she still cares for me'? / 'lets go to puzznuzz and tell her something and get her to give me attention because thats what I grew up doing'.
I do then try to repeatedly make him/her see it - even by bluntly saying it. However if that doesn't work then I eventually door slam. I just can't - it is painful and it feels like it's eating me alive.
Another possibility is if I feel like I'm unheard when I say that something hurts me and is done repeatedly. I will tuck the hurt away and literally ignore it because I think the bigger picture is more important and, I also think it might just be because I might have been in the wrong 'mood' (lol, gaslight myself?). I will continue to give but after a 'while' (can be years) I start slowly shutting down but I do lay out again and again why I feel that way. Eventually I start acknowledging that it makes me feel
shit & start seeing that what is happening doesn't correlate with
that bigger picture. Then, I just have enough and bam bam door slam.
I guess I sometimes struggle with my emotional boundaries.
Sorry, rant over

:/
edit: hehe just read the link
@Sandie33 posted. Pretty much that. <3