Wineserver semantics

[Waldek Hebisch]

There is ongoing disscusion on how to seed up the wineserver. 
So I have question concerning correctness of corrent implementation. 
Namely, for reading or writing files I have not found any locking in 
wineserver when issuing file descriptor to clients. On the other 
hand the client closes file descriptor just after use, and also 
disscusion in the group suggests that client is supposed to have 
exclusive acces to file. So I would like to know what is the case:
1) client is allowd to cache the descriptor
2) current implementation depends on winning a race
3) I missed locking in wineserver